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Question

Simplify:(a+x)2(ax)2
  1. 4ax
  2. 4a
  3. 2a + 2x
  4. 4x


Solution

The correct option is A 4ax
(a+x)2(ax)2
Using the identity:
a2b2=(a+b)(ab)(a+x)2(ax)2=(a+x+ax)(a+xa+x)=(2a)(2x)=4ax

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